Introdução

Welcome, you will learn that replacing or installing a new processor/s is by far the more difficult procedure to complete. Once complete you will have a faster computer and a stronger understanding of your Mac Pro.

Peças

Warning: Always shut down the computer before opening it to avoid damaging its internal components or the components you are installing. Do not open the computer or attempt to install items inside it while it is on.

Wait 5 to 10 minutes to allow the computer’s internal components to cool.

Warning: After you shut down the system, the internal components can be very hot. You must let the computer cool down before continuing.

Unplug all external cables from the computer except the power cord.

Touch the metal PCI access covers on the back of the computer to discharge any static electricity from your body.

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This procedure explains how to remove a standard card and a card that includes a booster cable. Before you can remove either type of card, however, you must first loosen the two captive screws that secure the PCI bracket to the enclosure and remove the bracket.

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Handle the card only by the edges.Do not touch its connectors or any of the components.Lift the card straight out from the connector to remove it, and insert it straight into the connector to install it.Do not rock the card from side to side and don’t force the card into the slot.Once the replacement card is installed, pull on it gently to check.

1) Release the small locking clip at the front of the card’s logic board connector by pushing the clip up toward the media shelf.

2) Holding the card by the top corners, pull up the card and remove it from its expansion slot.

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Replacement Note for Card Using One Booster Cable: Be sure to connect the card’s booster cable to the correct auxillary power connector on the logic board. Connect the booster cable for a card in PCI slot 1 to the lower connector. Connect the booster cable for a card in PCI slot 2 to the upper connector.

Replacement Note for Card Using Two Booster Cables: Connect both cables to the two auxillary power connectors.

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Replacement Note: When reinstalling the processor heatsink cover, make sure the tabs on the underside of the cover align with the slots directly below them. (The slots are on the front fan and memory cage on either side of the heatsink cover.)

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Using a long-handled, magnetized #1 Phillips screwdriver, loosen the four captive screws that mount the memory cage to the logic board.

Rotate the computer so that it is standing vertically. Using a magnetized short-handled or right-angled jeweler’s #1 Phillips screwdriver, carefully remove the two short screws that mount the memory cage to the bottom panel of the enclosure.

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Important: Before you install the cage in the enclosure, the fan should always be inserted partway into the cage.

Replacement Note: Before installing the memory cage and fan, make sure all logic board cables below the cage are out of the way so that the cage sits properly and the cables are not pinched or damaged when you tighten the screws.

Replacement Note: To install the memory cage and fan, maneuver the cage into position in the enclosure. Tighten at least two of the captive mounting screws. Then slide the fan toward the back panel, until you hear it snap into place.

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The steps in this procedure illustrate how to remove the lower processor (CPU B). The instructions are the same for removing the upper processor (CPU A).

Every time you remove a processor, you must replace the thermal grease on the processor heatsink. New grease and alcohol wipes for removing the previous grease are included with replacement processors. Instructions for applying the grease are included with the processor heatsinks procedure.

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The Mac Pro (Early 2008 Dual 3.2 GHz) computer uses a special coating on the processor heatsink and processor to manage the temperature in the computer. The silver-colored coating comes applied to the underside of the heatsink and the top of the processor.

Use the following guidelines when handling the processor heatsink and/or processor:

Wear disposable nitrile or latex gloves

Avoid touching the silver-colored coating on the underside of the heatsink and the top of the processor.

Always make a visual inspection of new or existing heatsinks and processors before installing them in the computer.

When removing or replacing the heatsink and/or processor, do not allow the heatsink to be separated from the processor for more than 30 minutes. The special coating on the heatsink and processor degrades with exposure to air; more than 30 minutes exposure could result in damage to the computer and a repeat, multi-part repair.

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Before installing a new or existing heatsink, check that the gasket that surrounds the silver colored coating on the underside of the heatsink is in good condition, as shown in the graphic. Replace the gasket if it shows obvious damage, such as cracks, folds, and broken-off surfaces, or if it is dislocated from the heatsink.

The gasket is available through GSX as part of the Mac Pro Grease Kit, part number 076-1258.

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Important: When removing or installing a processor, always hold the processor by the edges. Be extremely careful not to touch the gold pins on the bottom of the processor, as this type of connector is very sensitive to contamination. Also be careful not to touch the gold pins in the processor socket on the logic board.

You can identify the processor by the speed etched on the processor. You must clean off the thermal grease from installed processors to see the speed.

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Replacement Note: When installing the processor on the logic board, align the processor notch with the tab on the processor holder, as illustrated. Then lower the processor straight down onto the socket.

Note: Unlike in earlier Power Mac G5 computers, replacing a processor in Mac Pro (Early 2008) does not require running Apple Service Diagnostic for thermal calibration.

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Anyone know the specifications on the captive mounting screws for the heatsink? I'm doing an out-of-case build for a 2007 Mac Pro and need to know so that I can get the appropriate threading on my mounting board.